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Finding the Fourth Proportional to 719.39, 991.62 and 544.43

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Solution

The fourth proportional to 719.39, 991.62 and 544.43 is: 750.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.39 : 991.62 = 544.43 : x
  2. Step 2: Convert to fraction form
    719.39/991.62 = 544.43/x
  3. Step 3: Cross multiply
    719.39x = 991.62 × 544.43
  4. Step 4: Simplify right side
    719.39x = 539,864.95
  5. Step 5: Solve for x
    x = 539,864.95/719.39
  6. Step 6: Final answer
    x = 750.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.